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2 Sheets'Sh eet 1.

(ModeL-f G. DANIELS.

.GL'AMPING APPARATUS FOR PAPER GUTTING MAGHINES.

Patented Mar. 19, 1889.

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Nv PETERS, FhMo-Lilhogrlphen Washington, D.

(ModeL) 2 Sheets Sheet Z: G. DANIELS.

.GLAMPING APPARATUS FOR PAPER CUTTING MACHINES.

No. 399,743. Patented Mar. 19, 1889.

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UNITED STATES PATENT rrron,

GEORGE DANIELS, OF REDDISI'I, COUNTY OF LANCASTER, ENGLAND.

CLAMPING APPARATUS FOR PAPER-CUTTING MACHINES.

SPECIFICATION forming part of Letters Patent No. 399,743, dated March 19, 1889. Application filed September 2, 1887. Serial No. 248,619. (ModeL) Patented in England December 9, 1884,11'0. 16,160.

To aZZ whom it may concern.-

Be it known that I, GEORGE DANIELS, a subject of the Queen of Great Britain, residing atReddis'h, in the county of Lancaster, in the Kingdom of England, have invented certain new and useful Improvements in Clamping Apparatus for Paper-Cutting Machines, (for which a patent was granted to me in Great Britain, N 0. 16,160, dated December 9, 1884,) of which the following is a specification.

My invention relates to improvements in holdlng or clamping apparatus applicable to paper-cutting machines.

The objects of my improvements are threefold: first, to construct an automatic clamping or compressing device which will hold paper, cloth, mill-board, &o., in'piles of varying thickness while being cut in an ordinary papercutting machine; second, to provide means whereby the clamping-press may be brought down onto the pile of paper or material to be cut by a quick movement and the actual clamping or compressing afterward performed by a slow and powerful motion, the material being thus compressed and held in its compressed condition while the out is being made with little loss of power to the machine, and, third, to arrange locking mechanism in connection with thesaid clampingdevice, whereby the parts are automatically held or locked in position while the cut is being made. The means by which I attain these objects may be illustrated by reference to the accompanying drawings, in which Figure 1. is a front elevation. Fig. 2 is a side elevation, partly in section; and Fig. 3 is a plan view of my. invention, partly in section.

In the figures like letters refer to like parts, and only so much of the ordinary old parts of the paper-cutting machine is shown as is necessary to illustrate my invention.

The machine shown is that generally known as a guillotine machine, Abeing the framing; B, the knife; 0, the table, and D the top clamping bar or press. The ends of the clampin g-press D project through slots D in the side frames, A, which guide the said clampingpress in its upward and downward movement. Near the lower end of the machine, and directly below the clamping-press D, is a second frame or bar, E, (hereinafter styled the wedge-frame,) the ends of which project through and work in avertical direction in similar slots, E, in the side frames. The press D and frame E are connected together by the side rods, F. The side rods, F, pass through the ends of the wed ge-frame E, and, extending below it, are each surrounded by a spring, E, which is retained in position by the terminal nuts f, by which also the tension of the springs may be adjusted. The springs F normally hold the frame against collars or shoulders f on the side rods, so that ordinarily the parts D, E, and F will move together .as one rigid frame or press. The tension of the springs E is, however, so adjusted that when the bar D has put the requisite pressure upon the pile of material on the table 0 any further downward movement of the wedge-frame E will compress the springs .F and allow the frame E to move independently of the clampingpress D.

G is a treadle which oscillates 011 the rod g, and carries on its inner end a counter-weight, G. Said counterweight is connected through the medium of the links G and rocking lever G to the brackets E on the under side of the wedge-frame E, so that by depressing the treadle the clamping-press D may be lowered at will, the countenweight returning it to its original position when the treadle is re leased.

WVith the exception of the treadle device G, the whole of the clamping apparatus is worked from the central shaft, H. The said shaft is connected to the machine driving shaft by any suitable disengaging or starting device, and, when working, always turns in one direction, as shown by the arrows in Fig. 1. The various parts of the clamping apparatus derive their motion from cams on the central shaft, H, which cams will be hereinafter referred to in connection with the several movements to which they belong. The knife B is connected by a crank and connect ing-rod to the aforesaid shaft II, so as to make the cut automatically as soon as the material has been clamped.

The (comparatively) quick downward movement of the clamping-press referred to in the preamble is obtained as follows, the initial motion being derived from the cam K: Within the wedge-frame E is a double sliding wedge, E. This is slid forward in a horizontal direction by the rocking lever I, which is pivoted to the frame A at c. The sliding Wedge E is connected by the pin 6 to the lever I, and is forced thereby between the shoes J and the bottom of the wedge-frame. The wedge being unable (as will be hereinafter seen) to force the shoes J upward, it necessarily causes the wedge-frame (and with it the clamping-press D) to descend rapidly. The pin 6 is attached by suitable means to the wedge E and passes through a slot, c, in the side of the wedge-frame, which allows of the longitudinal movement of the wedge, a similar slot, i, in the lever I permitting the free descent of the wedge-frame E. To the lower part of the lever I is pivoted at 1' one end of the rod 1, which lies approximately in a horizontal position and is surrounded by a spiral spring, 2' The other end of 1 projects beyond the spring 1' and passes through the swivel-stud i which is carried at the lower extremity of the rocking lever 1 one side of the stud bearing against the end of the spring The spring at its other end rests against a shoulder or nut, i carried by the rod 1. The lever I is pivoted to the frame A at t, and carries at its upper end abowl, 1 which works in contact with the aforesaid cam K. The spring 1' serves to keep the bowl I against its cam. It also acts as a buffer to avoid overstraining of the parts, as will hereinafter appear. The wedge is slacked back by the reverse movement of the lever I, which for this object is provided at its upper extremity with a bowl, 1 The said bowl works in contact with the cam K, which is formed in one with the cam K. The spring i has also a tendency to keep the bowl I" in contact with its cam.

The (comparatively) slow movement of the press D referred to in the preamble is obtained by the following mechanism, which is worked from. the cam K The two shoes J aforesaid are pivoted at j to the radial levers J, so as to be free to move on their pivots and adjust themselves to the sliding wedge E Each of the radial. levers J carries at one end a pin, j, on which it oscillates in the wedge-frame E, the other end being provided with a pin, j by which it is connected with the knuckle-jointed levers L. The knucklejointed levers L, of which there are preferably four, are formed in pairs, the lower ends of which work on the pins 7' aforesaid, their upper ends being pivoted at Z to the fixed frame A, and their middle joints, Z, connected tomade the bowl L rides on the concentric part of the cam K so that no power is expended by the machine in holding down the pile of material, except that due to the friction between the bowl and cam-face.

The locking mechanism, hereinbefore referred to, derives its motion from the recessed cam-path K, which is sunk in the side of the cam K. The wedge E is provided between its sloping faces with a series of serrations or teeth, c with which a pawl, M, engages at the proper moment. The pawl M is pivoted at m to the wedge-frame E, and carries a pin, m, by means of which it is actuated. The pin m engages with one end of the link M, the other end of said link being pivoted to the lower extremity of the oscillating lever M The said lever is pivoted on the frame A at m and carries at its upper end a bowl, M which works in the aforesaid cam-path K The pin on works in a slot, m, in the link M in order to allow for any additional movement of the link after the pawl M has geared with the teeth The mode of action is as follows, the several parts in Fig. 1 being in the position assumed by them prior to cut-ting: The pile of material being placed on the table C, it is ad j usted in its proper position by the operator, who, depressing the treadle G, brings down the clamping-press D to indicate where the knife will cut. After setting the material for cutting, the treadle may or may not be released at the will of the operator, and the clamping apparatus is then set in motion. The shaft H, revolving in the direction shown by the arrow, causes the cam K to press outward the bowl 1 until the latter rides upon the concentric part of the cam, which commences about the point It. By the time the bowl I has reached this point, the wedge E, has through the medium of lever 1*, rod 1, and lever I been slid forward to the extent of its travel and the clamping-press D brought down onto the material 011 table O. The thrust of the lever I is sustained entirely by the spring 2' and if by any means the distance between the two pins "i and i should vary, as it will do, according as the distance between the bowls I and I varies, owing to the action of the cams K and K, then the spring will accommodate itself to these variations, and always tend to keep the bowls in contact with their respective cams. The wedge having been slid forward, the revolving shaft H causes the cam-path K to move the bowl M outward and release the pawl M, which engages with the teeth c and locks the wedge. The final squeeze is now brought upon the material by the cam K thrusting out the bowl L and straightening the knuckle-jointed levers L. Any movement of the wedge-frame E in excess of that required to compress the material on table 0 is taken up by the springs F. The knife B now descends and makes the out, during which time the bowls 1 M and L ride upon the concentric portions of their respective cams, the remainder of the clamping apparatus being stationary. The out being made, the knife ascends, and during its ascent the cam K causes or allows the knuckle-jointed levers to assume their original position, and the bowl M is guided inward by the groove cam-path K disengages the pawl M, and unlocks the wedge E By this time the cam Khas come in contact with the bowl I, which moves outward and causes the lever I to slack back the wedge 11 and allow the clamping-press D to rise by reason of the counter-weight G and its connections G and G The revolution of the shaft H being complete, and the various parts having taken up their original positions, the machine is stopped.

I claim as my invention 1. In combination, the supporting-frame, the press D, the wedge-frame E, and connecting-rods between them, the main shaft H, a series of cams on said shaft, a sliding wedge on the frame E, operating-connectionsbetween one of said cams on the main shaft and the sliding wedge for giving one partof the movement to the clamping apparatus, and an independent set of operating-connections between another of said cams on the main shaft and the sliding wedge for giving the final movement to the clamping parts, substantially as described.

2. In combination with the sliding press D, wedge-frame E, with connecting-bars between them, a stationary frame, A, the main shaft II in said frame, the sliding wedge on the wedge-frame, movable shoes J, engaging with said sliding wedge, operatingconnections from the sliding wedge to the main shaft, and independent operating-connections between the movable shoes and the main shaft,whereby the wedge-frame and press D in operation move at varying rates of speed.

In combination, the supporting-frame, the press I), the wedge-frame E, and connecting-rods between them, the main shaft H, a series of cams on said shaft, a sliding wedge on the frame E, operating-001111 ections between one of said cams on the main shaft and the sliding wedge for giving one part of the movement to the clamping apparatus, and an independent set of operating-connections between another of said cams on the main shaft and the sliding wedge for giving the final movement to the clamping parts, and a pawl engaging with the sliding wedge, and connections between said pawl and a third cam on the shaft II, whereby the parts are automatically locked in position, substantially as described.

a. In a clamping device, the combination of the frame E, the wedge E adjustable thereon, the links J J, the shoes J J, pivoted there- SCl'ibillg witnesses.

to, the jointed levers L L, the connecting-link L, having bowl L and the cam K substantially as described.

5. In combination with the sliding wedges E the pin 6, the rocking levers I I and the spring-connection I i interposed between said levers, substantially as described.

6. In combination with the press D and wedgeframe E, with connections between them, the frame A, the main shaft, a sliding wedge moving in and supported directly by said wedge-frame, and operating-connections between the wedge and main shaft, substantially as described.

7. In combination with the press D and wedge -frame E, with connections between them, the frame A, the main shaft, a sliding wedge moving in and supported directly by said wedge-frame, said wedge-frame having a slot, 6, a pin, 6, on the wedge projecting through said slot, an operating-lever, I, pivoted on the frame and provided with a slot, I, through which the pin 6 projects, and suitable connections between the leverI and shaft H, substantially as described.

8. In combination, the wedge E havingthe serrations 6 the pawl M, slotted link M, oseillating lever M bowl M and cam-plate K substantially as described.

9. In combination, the press D, the Wedgeframe E, with connections between them,the supporting-frame A, the sliding wedge E on said wedge-frame, the main. shaft H, cams K K on said shaft, the rocking lever 1 pivoted to said supportirig-frame, the rocking lever I, also pivoted to the main frame, the rod connecting the same, bowls on one end of said rocking levers engaging with the cams, respectively, and a spring, 7?, for keeping said bowls normally in engagement with the cams.

10. In combination, the supporting-frame, the press D, the slotted wedge-frame E, connecting-rods between them, a wedge, E sliding on said frame and provided with a pin projecting through the slot thereof, a lever, I, pivoted on the frame and provided with a slot through which the pin e projects, an operating-shaft II, a series of cams on said shaft,

connections between said levcrI and the cams on the shaft for moving the sliding wedge, movable shoes J in engagement with said sliding wedge, and connections between the cams on the shaft and the movable shoes for compressing them against the Wedge, substantially as described.

In testimony whereof I have signed my name 10 this specification in the presence of two sub- G. DANIELS. Vitnesses:

WM. P. THOMPSON,

II. P. SHOOBRIDGE. 

